A Case Study on the Establishment of an Excavation Impact Range for Evaluating the Ground Stability of Deep Tunnels and Vertical Shaft Sections in Urban Areas

Seohyun Lee; Sang Inn Woo

doi:10.7843/kgs.2022.38.8.67

All Issue

2022 Vol.38, Issue 8 Preview Page Next Page

A Case Study on the Establishment of an Excavation Impact Range for Evaluating the Ground Stability of Deep Tunnels and Vertical Shaft Sections in Urban Areas 도심지 대심도 터널 및 수직구 구간 지반안정성 평가를 위한 굴착영향범위 설정 사례

31 August 2022. pp. 67-74

PDF XML

Abstract

The setting of the target area for ground stability evaluation during ground excavation is categorized into theoretical and empirical estimation methods and numerical analysis methods. Generally, the applied theoretical and empirical estimation methods include those by Peck (1969), Caspe (1966), and Clough et al. (1990). The numerical analysis method comprehensively considered the current status of the task section (maximum excavation depth section, ground condition vulnerable section, etc.). It reflected the results of performing two and three-dimensional numerical analyses on the weakest section. Therefore, this study shows an example of setting the scope of influence when excavating the vertical and tunnel sections of a 000-line double-track private investment project through the above theoretical, empirical, and numerical analysis methods.

Keywords

Excavation

Ground stability

Numerical analysis

Target area

Theory

Vertical shaft

지반굴착시 지반안정성 검토를 위한 대상지역의 설정은 이론식 및 경험식 추정방법과 수치해석에 의한 방법으로 구분한다. 일반적으로 적용되는 이론식 및 경험적 추정 방법은 Peck(1969)의 곡선방법, Caspe(1966)의 방법 및 Clough 등(1990)의 방법이 있다. 수치해석에 의한 방법은 과업구간의 현황(지반조건이 가장 취약한 구간, 최대 굴착심도 구간, 주요 인접 구조물 위치 구간 등)을 종합적으로 고려하여 가장 취약한 단면에 대해 2차원 및 3차원 수치해석을 수행한 결과를 반영하였다. 본 논문에서는 위와 같은 이론식 및 경험식, 수치해석을 통해서 000선 복선전철 민간투자사업의 수직구 구간 및 터널 구간 굴착시 영향범위를 설정한 사례를 보여주고자 한다.

References

Attewell, P.B. and Farmer, I.W. (1974), Ground Deformation Resulting from Sheild Tunneling in London Clay, Canadian Geotechnical Journal, Vol.11, No.3, pp.380-395. 10.1139/t74-039

Caspe, M.S. (1996), Surface Settlement Adjacent to Braced Open Cuts, J. of Soil Mechanics and Foundation Eng. ASCE, Vol.92, pp.51-59. 10.1061/JSFEAQ.0000889

Clough, G.W. and O'Rourke, T.D. (1990), Construction Induced Movements of in Situ Walls, Proc., Specialty Conf. on Design and Performance of Earth Retaining Structures., New York, ASCE, pp.439-470.

Han, S.M., Lee, D.H., and Lee, S.H. (2021), Safety Effect Evaluation of Existing Metro Tunnel by Deep Urban Tunnelling, J. of the Korean Geotechnical Society, Vol.37, No.9, pp.37-50.

O'Reilly, M.P. and New, B.M. (1982), Settlements Above Tunnels in the United Kingdom their Magnitude and Prediction, Tunnelling'82. Ed.Jones, M.J., pp.173-181.

Park, C.M., You, K.H., and Lee, H. (2018), A Development of the Ground Settlement Evaluation Chart on Tunnel Excavation, Korea Tunnel Underground Space Society, Vol.20, No.6, pp.1105-1123.

Peck, R.B. (1969), Deep Excavation and Tunnelling in Soft Ground, Proc. of 7th Inter. Conf. on Soil Mech and Found. Eng., Mexico, Vol.4, pp.259-290.

Seoul Metro (2001), Practical manual for Adjacent Construction in Urban Metro, pp.1-222.

Underground Safety Assessment Report Standard Manual (2022), Ministry of Land, Infrastructure and Transport, pp.35-43.

Information

Publisher :The Korean Geotechnical Society
Publisher(Ko) :한국지반공학회
Journal Title :Journal of the Korean Geotechnical Society
Journal Title(Ko) :한국지반공학회 논문집
Volume : 38
No :8
Pages :67-74
Received Date : 2022-07-01
Revised Date : 2022-07-22
Accepted Date : 2022-07-22
DOI :https://doi.org/10.7843/kgs.2022.38.8.67

Journal of the Korean Geotechnical Society ISSN:1229-2427(Print) 2288-646X(Online) 한국지반공학회 논문집

All Issue